This article is about the Underground Path in Kanto Routes 5 and 6. For the Underground Path in Kanto Routes 7 and 8, see Underground Path (Kanto Routes 7-8).
The Underground Path (Japanese: ちかつうろUnderground Path) between Routes5 and 6 is located directly underneath Saffron City and terminates just to the north and to the south of Saffron City.
In GenerationsI and III, the path is the only way to travel between Cerulean City and Vermilion City until the gates surrounding Saffron City are opened, which does not occur until their guards receive a drink from Celadon City. In Generations II and IV, both entrances to the path are blocked until the problem at the Power Plant is solved.
The path is a long, dark hallway that travels under Saffron City. Despite the cave-like lighting of the path, there is no threat to be attacked by wild Pokémon. Occasionally, by using an Itemfinder or Dowsing MCHNHGSS, items that Trainers have dropped along the path can be found and retrieved.
A colored background means that the Pokémon can be found in this location in the specified game. A white background with a colored letter means that the Pokémon cannot be found here.
A colored background means that the Pokémon can be found in this location in the specified game. A white background with a colored letter means that the Pokémon cannot be found here.
Differences between generations
Across all generations, the design is virtually the same, only with updated graphics, although it is much shorter in GenerationsII and IV. In Generation IV, a man is in the Underground Path who will trade TM64 (Explosion) for the RageCandyBar that can be bought in Mahogany Town.
In Generation II only, the Underground Path is a map location in the Pokégear.
The Machoke that the player can receive in a trade here in Pokémon Yellow will immediately evolve into a Machamp after the trade is completed, marking the only time when a Pokémon obtained in an in-game trade evolves immediately in an internationally released Pokémon game. Japanese Pokémon Blue also had two this kind of trades, but both trades involved different Pokémon in the internationally released Pokémon Red and Blue.